This comprehensive volume examines the little-known relationship both artistic and personal between two of the greatest avant-garde artists of the twentieth century. Pablo Picasso and Alberto Giacometti, each in their own way, deeply disrupted existing artistic codes and pushed the barriers of established aesthetic canons in the domains of painting and sculpture. This tome reveals their friendship and the little-known artistic dialogue between them on the subjects and questions central to their work. Richly illustrated, this volume establishes clear correlations in their artistic production and provides new insight into the Picasso and Giacometti ateliers through incisive essays from art historians, which draw on previously unpublished documents. An anthology of historical texts offers the intimate perspective of the master artists contemporaries including Man Ray, whose descriptions reveal fascinating portraits of the characters and working habits of his two friends.